Chemistry
Grade-9
Easy

Question

Which elements have the most similar chemical properties?

  1. K and Na
  2. K and Ca
  3. K and Cl
  4. K and S

hintHint:

In a group elements have similar chemical properties.

The correct answer is: K and Na


    • In Mendeleev's periodic table there are 118 elements arranged in 18 groups and 7 periods.
    • As we move down the group chemical properties are similar.
    • Na and K are in same group and has similar chemical properties.

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